I have nevertheless to have any issues from this product or service. The FRT-15L3 comes with blue loctite with the wander in pins. For thoses Which may have difficulties, you have to get H3 buffer tube and an entire auto Bolt provider team. Mine closes with no problems. Appears like https://landenupkct.kylieblog.com/36870176/the-best-side-of-rare-breed-frt-trigger